China Doctoral Dissertation Full-text Database ( CDFD ) is a comprehensive, high-quality, data-standardized, fast-published, practic

中文在线（www.ChineseAll.com）2000年成立于清华大学，是中国网络出版的开创者之一，为国内最领先的正版数字内容传播机构。

CNKI AI is a new exploration of China Knowledge Network to fully embrace AI and empower knowledge services.

The Conference Proceedings citation indexes include the published literature of the most significant conferences, symposia, seminars, colloquia, workshops, and conventions in a wide range of catego

The CXSTAR E - book Platform is developed by Beijing CXSTAR Information Technology Co., Ltd. This platform has in - depth cooperation with publishers.

Superstar Group, established in 1993, is the world's largest provider of Chinese digital book resources.

As an independent academic publisher, De Gruyter Brill boasts a history of over 300 years, publishing works in subject areas ranging from humanities, social sciences, science, technology, mathemati

EBSCO is one of the earliest companies in the world to launch an online full-text database retrieval system.

Emerald Publishing was established in 1967 and is headquartered in the United Kingdom. It publishes over 300 academic journals, nearly 5,000 scholarly books, and more than 3,000 teaching cases.

Engineering Village is the world's leading comprehensive information retrieval platform in the engineering field, operated by Elsevier.